[JusticeMagnum]

After seeing the the Nago Figuart, yeah she definitely can't swap. While yeah the front face plate can come off, the mouth plate can't which means she wouldn't be able to swap forms at all unless they made new heads that has Nago's back helmet details & the mouth molded to be whatever form you wanted (compared to the guys who use the same heads and just swap jaw pieces. Granted it's still not perfect for the guys since there's the issue of the eye colors, but that feels like less of an oversight and more like the gimmick was specifically designed with Geats in mind only). Even if they released a Hakubi entry form, they still need to include an entirely new head for Nago to be able to use it since the back of Hakubi's helmet has completely different details.

If anything I think that the removal faceplate & waist connector bit is just leftovers from flirting with the idea of making Nago be able to form change before feeling it wasn't worth it.